FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


CAS Number 2237965-02-3

Carbaldehyde Monomers, Chemistry Building Blocks, COF Ligands, Materials, Monomers, Porous Organic Frameworks

Image missing
Product Code B3611-1g
Price £129 ex. VAT

Covalent organic frameworks (COFs) diphenylacetylene ligand

Used in the synthesis of COFs cages for porous materials and molecular motors

Specifications | MSDS | Literature and Reviews

5,5'-(Ethyne-1,2-diyl)diisophthalaldehyde (CAS number 2237965-02-3), is a diphenylacetylene ligand featuring four aldehyde groups. It is utilized in the synthesis of COFs and porous organic cages for porous materials applications. For example, when 5,5'-(ethyne-1,2-diyl)diisophthalaldehyde reacts with cyclohexane-1,2-diamine, [3+6] trigonal prism cages are formed. These resulting cages can undergo reversible transformation into [6+12] truncated tetrahedron cages, thereby leading to variations in pore sizes.

5,5'-(Ethyne-1,2-diyl)diisophthalaldehyde is also employed in the synthesis of dumbbell-shaped macro-cages, cooperating with tri-topic amines and di-topic aldehydes. These organic cage dumbbells showcase a triphenylacetylene core at the centre, enabling unrestricted rotation of each end of the dumbbells. Hence, its potential for application in molecular motor research is promising.

Facile reactions

Facile reactions

Aldehyde possesses excellent reactivity

High Purity 2237965-02-3

High Purity

>98% Purity

Worldwide shipping for 2237965-02-3

Worldwide shipping

Quick and reliable shipping

MOF and COF ligands

MOF and COF ligands

Aldehyde ligand for cross-linked COF networks

General Information

CAS Number 2237965-02-3
Chemical Formula C18H10O4
Full Name 5,5'-(1,2-Ethynediyl)diisophthalaldehyde
Molecular Weight 290.3 g/mol
Synonyms 5-[2-(3,5-Diformylphenyl)ethynyl]benzene-1,3-dicarbaldehyde
Classification / Family COFs, CMPs, Porous materials, Molecular motors

Chemical Structure

5,5'-(Ethyne-1,2-diyl)diisophthalaldehyde chemical structure, CAS 2237965-02-3.
5,5'-(Ethyne-1,2-diyl)diisophthalaldehyde chemical structure, CAS 2237965-02-3

Product Details

Purity 98%
Melting Point Tm = 209 °C – 211 °C
Appearance Yellow powder

MSDS Documentation

5,5'-(Ethyne-1,2-diyl)diisophthalaldehyde5,5'-(Ethyne-1,2-diyl)diisophthalaldehyde MSDS Sheet

Literature and Reviews

  1. Post-synthetic modification of porous organic cages, H. Wang et al., Chem. Soc. Rev., 50, 8874–8886 (2021); DOI: 10.1039/D0CS01142H.
  2. Reticular synthesis of porous molecular 1D nanotubes and 3D networks, A. Slater et al., Nature Chem., 9, 17–25 (2017); DOI: 10.1038/nchem.2663.
  3. Organic Cage Dumbbells, R. Greenaway et al., Chem. Eur. J., 26, 3718 (2020); DOI: 10.1002/chem.201905623.
Return to the top